The Evolution of a Convergent Orogen from Upper to Lower Crustal Levels

Klepeis0087323对全球会聚边缘的研究表明，大陆地壳内部的变形模式因地壳水平和构造环境而异。 该项目的目的是确定应变是如何从一个古老的造山带的上层垂直分配到下层的，在那里，中地壳和下地壳的相对强度和流变性在收敛过程中发生了变化，并将利用新西兰峡湾的一个深受侵蚀的早白垩世麻粒岩带。 研究结果应能衡量古代下地壳应变场的特征和运动学，并确定它们如何在地壳中垂直变化，从而确定上、中、下地壳耦合的程度，以及随着造山作用的进行，强度剖面变化的影响。 成功的结果有望适用于广泛的构造

Klepeis0087323Studies of convergent margins worldwide have shown that deformation patterns within continental crust vary according to crustal level and tectonic settings. This project is aimed at determining how strain was partitioned vertically from upper to lower levels of an ancient orogen where the relative strengths and rheology of the middle and lower crust changed during convergence, and will utilize a deeply eroded, early Cretaceous granulite belt in Fiordland, New Zealand. Results should provide a measure of the characteristics and kinematics of ancient lower crustal strain fields and determine how they changed vertically through the crust, thereby addressing the extent to which the upper, middle and lower crust were coupled, and the effects of a changing strength profile as orogenesis proceeded. Successful results are expected to be applicable to a wide range of tectonic